// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_BASE_NETWORK_CHANGE_NOTIFIER_LINUX_H_
#define NET_BASE_NETWORK_CHANGE_NOTIFIER_LINUX_H_

#include <memory>
#include <unordered_set>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "net/base/net_export.h"
#include "net/base/network_change_notifier.h"

namespace net {

class NET_EXPORT_PRIVATE NetworkChangeNotifierLinux
    : public NetworkChangeNotifier {
public:
    // Creates NetworkChangeNotifierLinux with a list of ignored interfaces.
    // |ignored_interfaces| is the list of interfaces to ignore. An ignored
    // interface will not trigger IP address or connection type notifications.
    // NOTE: Only ignore interfaces not used to connect to the internet. Adding
    // interfaces used to connect to the internet can cause critical network
    // changed signals to be lost allowing incorrect stale state to persist.
    explicit NetworkChangeNotifierLinux(
        const std::unordered_set<std::string>& ignored_interfaces);

private:
    class Thread;

    ~NetworkChangeNotifierLinux() override;
    static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsLinux();

    // NetworkChangeNotifier:
    ConnectionType GetCurrentConnectionType() const override;

    const internal::AddressTrackerLinux* GetAddressTrackerInternal()
        const override;

    // The thread used to listen for notifications.  This relays the notification
    // to the registered observers without posting back to the thread the object
    // was created on.
    // Also used for DnsConfigService which requires TYPE_IO message loop.
    std::unique_ptr<Thread> notifier_thread_;

    DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierLinux);
};

} // namespace net

#endif // NET_BASE_NETWORK_CHANGE_NOTIFIER_LINUX_H_
